|Table of Contents|

Performance of Shell-aggregates from Different Siliceous Materials and Its Concrete

《南京理工大学学报》(自然科学版)[ISSN:1005-9830/CN:32-1397/N]

Issue:
2012年01期
Page:
165-170
Research Field:
Publishing date:

Info

Title:
Performance of Shell-aggregates from Different Siliceous Materials and Its Concrete
Author(s):
MA Hai-long12CUI Chong1SUN Zhang-ao1
1.School of Materials Science and Engineering,NUST,Nanjing 210094,China; 2.Institute of Ethnic Preparatory Education,Ningxia University,Yinchuan 750021,China
Keywords:
propylene oxide sludges clay bricks fly ashes diatomites powdery quartz sands aggregates strength loss rates
PACS:
TU528.09
DOI:
-
Abstract:
Fly ash,waste clay brick,diatomite and powdery quartz sand are used as siliceous materials to prepare propylene oxide sludge shell-aggregates under the condition of autoclaved(180 ℃,1.0 MPa)curing.The physical and mechanical performance of shell-aggregates from propylene oxide sludge and different siliceous materials and its concrete is investigated by the X-ray diffraction and scanning electron microscopy.The results indicate that all these siliceous materials can react with Ca(OH)2 contained in propylene oxide sludge and can be used to prepare high-performance aggregates used in load-bearing structures.Better aggregate forming can be observed in experiment when a given number of waste clay bricks,diatomites or powdery quartz sands are added in fly ash.The highest compressive strength of semi-lightweight concrete using propylene oxide sludge shell-aggregates as coarse aggregates can reach 81.5 MPa.Aggregates contained in concrete are in a condition of three-dimensional stress and thus strength loss rate of concrete is lower than that of a single aggregate when other siliceous materials are added in fly ash.

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Memo

Memo:
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Last Update: 2012-10-12